高性能钢管混凝土拱桥受力性能与工程应用研究

发布时间：2018-02-04 12:19

本文关键词： 钢管混凝土拱桥高性能优化设计受力性能荷载试验仿真分析　出处：《长安大学》2015年硕士论文　论文类型：学位论文

【摘要】：高性能钢管混凝土拱桥是随着高性能钢和高性能混凝土在钢管混凝土拱桥中的应用而出现的一种受力性能优越、适应性强的钢管混凝土拱桥。高性能钢和高性能混凝土的发展与应用为高性能钢管混凝土拱桥的发展奠定了坚实基础,高性能钢管混凝土拱桥凭借自身独特的优势正在向着大跨度方向发展。高性能钢管混凝土拱桥以其结构轻巧、适用性强、承载能力大和造型美观等特点,倍受国内外设计者的青睐。高性能钢管混凝土拱桥的受力性能的基础性研究仍需不断完善,故本文开展高性能钢管混凝土拱桥受力性能与工程应用研究具有重要的研究意义与工程实用价值。本文的主要研究工作如下:1.广泛调研桥梁用高性能材料以及钢管混凝土拱桥的研究历史与现状,总结分析高性能材料和钢管混凝土拱桥的受力特点、研究热点及其工程应用。在既有研究成果基础上,提出了高性能钢管混凝土拱桥的主要研究内容。2.对高性能钢管混凝土拱桥受力性能进行了承载能力、稳定性、动力特性和疲劳性的基本理论分析及研究总结,并就国内相关规范对承载能力计算公式和影响受力性能的因素进行分析,为本文开展高性能钢管混凝土拱桥承载能力研究奠定基础。3.通过总结国内外工程经验和试验研究成果,分析确定影响高性能钢管混凝土拱桥受力性能的因素;对桥型、矢跨比和截面形式等主要因素进行深入分析,确定了各影响因素参数的取值范围。依托两座高性能钢管混凝土拱桥工程实例,从设计参数、结构构造、施工要点等方面对高性能钢管混凝土拱桥进行深入分析,提出优化设计思路、方法和方案,对桥梁的设计和施工提出合理化建议。4.利用Midas/Civil建立有限元模型,对高性能钢管混凝土拱桥依托工程开展施工阶段和成桥阶段的静力和动力特性进行仿真分析。通过仿真分析结果与实桥监测结果进行对比,分析了高性能钢管混凝土拱桥施工阶段和成桥状态的受力性能;通过实桥静载试验和动载试验,对高性能钢管混凝土拱桥的受力性能和工作性能进行评价分析。
[Abstract]:With the application of high performance steel and high performance concrete in concrete filled steel tubular arch bridge, high performance concrete filled steel tube arch bridge is a kind of superior mechanical performance. The development and application of high performance steel and high performance concrete have laid a solid foundation for the development of high performance concrete filled steel tube arch bridge. High performance CFST arch bridge is developing towards the direction of long span by virtue of its own unique advantages. High performance CFST arch bridge is characterized by its lightweight structure, strong applicability, large bearing capacity and beautiful shape. The basic research on the mechanical behavior of high performance concrete filled steel tubular arch bridge still needs to be improved. Therefore, it is of great significance and practical value to study the mechanical behavior and engineering application of high performance CFST arch bridge in this paper. The main research work of this paper is as follows:. 1. The history and present situation of high performance material and concrete-filled steel tubular arch bridge are investigated extensively. Summarize and analyze the mechanical characteristics of high performance material and concrete filled steel tube arch bridge, research hot spot and its engineering application. On the basis of existing research results. The main research content of high performance concrete filled steel tube arch bridge is put forward. 2. The bearing capacity and stability of high performance concrete filled steel tube arch bridge are carried out. The basic theoretical analysis and research summary of the dynamic characteristics and fatigue properties, and the analysis of the calculation formula of the bearing capacity and the factors affecting the mechanical performance of the relevant codes in China. It lays a foundation for the research of bearing capacity of high performance concrete-filled steel tubular arch bridge in this paper. Through summing up the engineering experience and experimental research results at home and abroad. The factors influencing the mechanical behavior of high performance CFST arch bridge are analyzed and determined. The main factors, such as bridge type, rise-span ratio and section form, are deeply analyzed, and the value range of each factor parameter is determined. Based on two high performance concrete filled steel tube arch bridge engineering examples, the design parameters and structure construction are analyzed. The main points of construction of high performance concrete-filled steel tube arch bridge are analyzed, and the optimal design ideas, methods and schemes are put forward. Finally, the rational suggestions for the design and construction of the bridge are put forward. 4. The finite element model is established by using Midas/Civil. The static and dynamic characteristics of high performance concrete-filled steel tubular arch bridge during construction and completion stages are simulated and analyzed. The simulation results are compared with the real bridge monitoring results. The mechanical performance of high performance concrete filled steel tube arch bridge in construction stage and completion state is analyzed. Through the static load test and the dynamic load test of the real bridge, the mechanical and working performance of the high performance concrete filled steel tube arch bridge is evaluated and analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U441;U448.22

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